Practice Samurai Sword

ABSTRACT

A practice sword simulating a Katana. The practice sword provides an affordable, safe practice weapon that correctly simulates the size, weight and curve of the Japanese sword with both simulated cutting and thrusting capabilities. The practice sword includes generally a handle, a handle guard, and a simulated blade. The blade is comprised of a plurality of flexible limbs. The limbs are interconnected at a proximal end, proximate the handle and handle guard. The distal end of each limb is limited to axial movement with respect to each other limb. The blade includes a plurality of flexible limbs. The proximal end of each flexible limb is fixed relative to each other proximate the handle guard. The distal end of each flexible limb is limited to axial movement with respect to each other flexible limb.

CROSS-REFERENCE TO RELATED APPLICATIONS

Not Applicable

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

Not Applicable

BACKGROUND OF THE INVENTION

1. Field of Invention

The present invention pertains to the field of martial arts. Moreparticularly, this invention is related to a practice Samurai sword forsimulating combat with a safe weapon closely emulating the size, weightand shape of a Samurai sword.

2. Description of the Related Art

In the field of martial arts, it is well know that many forms of combatuse weapons of one fashion or another. Many of the martial arts useswords in hand-to-hand combat. However, it is also well known that manyof the martial arts are practiced as an art form and not as a means foractual combat. In order to reduce the danger associated with authenticweaponry, it is well-known to use practice weaponry. For example, aShinai is used to simulate a Japanese sword. A Shinai, from the verb“shinau” meaning “to bend” or “to be flexible”, is a bamboo Kendo swordthat allows a Kendoist to practice freely without fear of serious injuryto his self or others. The modern Shinai is constructed of four stavesof bamboo fitted together into a cylinder and held together by leatherand a string.

The first Shinai were made of split bamboo and completely covered in acloth or leather bag known as a Fukuro Shinai or bag Shinai. Shinai wereof many different lengths and weights. Today, the Shinai is made frombamboo that is cut from the bottom of the culm, or stem, about fourinches above ground. The stem is split vertically into six to eightpieces. The bamboo is then dried and four pieces are selected,straightened, and then planed and shaped into a Shinai. As will beunderstood, there are deliberate methods used to produce each Shinai.

In addition to the four bamboo slats, the Shinai includes a leatherhandgrip called the Tsuka-gawa covering the tsuka, or handle, a leathercup called the sakigawa on the tip, or kissaki, and a tsuba, or handguard. The tsuba is fabricated from resin or leather and is held inplace by a tsuba-dome, which is a rubber disk. The whole is kepttogether under tension by a string, called a tsuru, connecting theleather parts at each end, and by a leather binding, or Nakayui, aroundthe Shinai marking out the Datotsubu (the valid strike area of theShinai) or the Monouchi, which is the top part of the blade toward thetip, which is the most effective cutting area of the Shinai.

The Shinai allows full strength cuts to be made without the risk ofinjuring the training partner as would an authentic sword or a solidwooden dummy sword. The force of the blow is dissipated by the bamboosections spreading out on contact. However, the force is often painful.A Shinai strike does not feel like a sword and a thrust can bedangerous, as there is no give in the blade.

In Kendo the solid wooden sword, or boken, is still used in the KendoKata, and more rarely in Waza, practice in order to gain a betterunderstanding of how the technique works with a sword. However it is notused for free-sparring. The steel Katana, or alloy laito are used byhigh grades in Kata demonstrations and are the standard weapon used inIaido.

Other devices have been developed to overcome these and similar problemsassociated with practice swords. Typical of the art are those devicesdisclosed in the following U.S. patents:

Pat. No. Inventor(s) Issue Date 5,295,926 T. Tanabe Mar. 22, 19945,324,227 C. Yuh-Ching Jun. 28, 1994 5,598,596 M. R. Jones et al. Feb.4, 1997 5,630,998 K. L. Parsons May 20, 1997 6,036,602 D. G. Abbott Mar.14, 2000 6,497,619 D. D. Dowdy et al. Dec. 24, 2002

Of these patents, Tanabe (926) discloses a soft sword. The '926 deviceincludes a core rod which comprises a short flexible center core havinga grip and a guard constructed in one body and a soft core mountedcoaxially around said flexible center core. A bag is disposed on thecore rod by engaging at both ends of the core rod. A grip tape iswrapped onto the grip and over the bag. The '926 device is configuredsuch that neither participants nor spectators will be injured during amatch, whether by a strike using the device or by a portion of thedevice becoming dislodged from the device and being flung through theair.

U.S. Pat. No. 5,324,227, issued to C. Yuh-Ching, discloses a toy hittingrod. The '227 device includes a main hitting rod made of resilientmaterial and formed with a longitudinal hole at the center. Two alignedholes are formed at one end thereof. An inner hitting rod is fabricatedfrom resilient material and inserted into the longitudinal hole of themain hitting rod. A spring is sleeved on one end of the inner hittingrod. A hand grip is fabricated from a hard material and defines a recessfor grasping. The grip has a connecting rod having a through hole inalignment with the aligned holes of the main hitting rod. The connectingrod defines two protuberances engageable with the other end of thespring. The '227 device is configured for safe use as a “weapon” inhand-to-hand combat. Upon impact, the main hitting rod is deformed toreduce the impact. After impact, the resiliency of the main hitting rodcauses the device to return to its original state.

Jones et al. in the '596 patent, disclose a club shaped device having aremovable cover. The cover encloses a substantial portion of the cluband is fastened thereto. In one embodiment, the '596 device is composedof a head and a handle both constructed from a resilient material, suchas dense foam rubber. The handle has a hollow interior area which has anopening at its bottom. The edges of the removable covering are placedinto the opening and a removable plug is inserted into the opening tosteadfastly hold the edges of the cover against the inner wall of thehandle. In one embodiment, the '596 device is used as a soft clubnovelty item without causing injury to items struck by the club.

In his '998 patent, Parsons discloses a mock training baton including aflexible rod covered by a cushioning material secured to the rod by aremovable cover. The '998 device may include a protective resilient diskat the ends of the rod and a means for securing the baton to the belt oftrainee. The diameter, configuration and material of the handle of themock training baton are identical to those of the handle of the actualstandard issue baton. The mock baton may include a resilient ring forsecuring the cover to the baton and a fixed collar for anchoring theresilient disk in place.

Abbot, in the '602 patent, discloses a sparring instrument which isdescribed as allowing for safe, pain free, full contact training. Thesparring instrument comprises a handle and a striking portion having abushing armature mounted thereto. The bushing armature comprises a tiprod telescopically received within a plurality of telescopically mountedcylinders. The bushing armature is covered by a sheath extending beyondthe tip rod. The sheath is covered by a soft, flexible material to itsend. The sheath is made of a soft, resilient material whereby the sheathextends from the end of the soft, flexible material when the instrumentis bent.

Finally, Dowdy et al., in their '619 patent, disclose A scoring systemis disclosed which allows for safe, accurate scoring during simulatedcombat situations. The scoring system includes a simulated strikingapparatus having a marking means to safely deliver an erasable markingagent when the striking apparatus contacts an opponent. The strikingsections of the apparatus are buffered by a soft, resilient material toreduce the impact from a striking type blow.

BRIEF SUMMARY OF THE INVENTION

The present invention is a practice sword simulating a Katana. Thepractice sword provides an affordable, safe practice weapon thatcorrectly simulates the size, weight and curve of the Japanese swordwith both simulated cutting and thrusting capabilities. The practicesword includes generally a handle, a handle guard, and a simulatedblade. The blade is comprised of a plurality of flexible limbs. Thelimbs are interconnected at a proximal end, proximate the handle andhandle guard. The distal end of each limb is limited to axial movementwith respect to each other limb.

In one embodiment, the blade is comprised of an upper limb and a lowerlimb. The upper limb defines an inverted substantially U-shapedconfiguration having a substantially flat top surface. The top surfacebeing substantially flat provides stability of the blade in the lateraldirections. The lower limb also defines a substantially U-shapedconfiguration having an arcuate bottom surface, which provides stabilityof the blade in the vertical directions and creates a less harmful andless painful impact zone.

At least one clamp is provided for maintaining the relative positions ofthe upper and lower limbs. A proximal end clamp is secured to the distalend of each of the upper and lower limbs proximate the handle guard. Theproximal end clamp serves to secure the proximal end of each of theupper and lower limbs together. At least one medial clamps is positionedalong the length of the blade. A distal end clamp is disposed at thedistal end of the blade. In a shorter sword, a single medial clamp isprovided. Each of the medial and distal end clamps defines a saddleportion configured to slidably receive the lower limb. Each of themedial clamps and the distal end clamp is configured to be secured tothe upper limb, such that the lower limb is limited only to axialmovement with respect to the upper limb.

The distal end clamp is further configured to retain the distal end ofthe lower limb, which is longer than the upper limb. When the upper andlower limbs are collectively deformed to bring the distal ends thereofinto alignment, the distal end clamp is installed to maintain thecurvature of the sword blade.

As the sword is thrust, the distal end of the sword is bent backward,causing the distal end of the lower limb to travel in a longitudinaldirection backward within the distal end clamp. Because the medial anddistal end clamps are secured only to the upper limb, the upper andlower limbs are permitted to bend without the sides of the swordbuckling or breaking.

As the practice sword is used to strike, the floating lower limb and thedistance between the medial and distal end clamps allow for substantialimpact absorption. The upper and the lower limbs are in contact whenresting in the preloaded state. Impact causes the upper and lower limbsto separate from each other, thus relieving some force.

The handle includes an extended portion of the proximal end of each ofthe upper and lower limbs. The handle guard defines an opening throughwhich the blade is received prior to the securement of the proximal end,medial and distal end clamps. A handle insert is received between theextended portions of the respective proximal ends of the upper and lowerlimbs and secured thereto.

A further embodiment of the practice sword more closely resembling theKatana incorporates a blade having three flexible limbs, each fabricatedpreferably from bamboo. Each flexible limb is formed into a slightlongitudinal curve. The curvature of the limbs allows the simulatedblade to bend backward as a blow is struck, thus dissipating the forceof the blow. Conversely, the longitudinal curvature limits forwardbending of the blade. The force of a thrust with the sword is alsodissipated by the same bending action.

The handle defines two extended portions. The handle guard defines anopening through which the extended portion is received. Upper and lowershoulders are defined by the handle for engaging the handle guard tolimit movement of the handle guard toward the handle. The extendedportions are spaced apart to closely receive the proximal end of themedial flexible limb. The uppermost flexible limb is disposed above theupper extended portion. Likewise, the lowermost flexible limb isdisposed below the lower extended portion. The proximal end of each ofthe uppermost and lowermost limbs is disposed at the handle guard,thereby limiting movement of the handle guard away from the handle. Theproximal end of each flexible limb is secured to the handle in aconventional manner.

An end spacer is disposed at the distal end of the blade. The spacerdefines a distal end wall that provides a striking surface whenthrusting the sword. Two spacing elements extend from the distal endwall. Each spacing element is configured to be received between thedistal ends of an adjacent pair of flexible limbs. The distal end of theblade is wrapped with a distal end cover in order to maintain theposition of the end spacer with respect to the uppermost flexible limb.The distal end of each of the intermediate and lowermost flexible limbsis allowed to float within the end spacer.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

The above-mentioned features of the invention will become more clearlyunderstood from the following detailed description of the invention readtogether with the drawings in which:

FIG. 1 is a perspective view of a preferred embodiment of a practicesword constructed in accordance with several features of the presentinvention;

FIG. 2 is an exploded view, in perspective, of the practice sword ofFIG. 1;

FIG. 3A is a side elevation view of the distal end of the blade, priorto the securement of the distal end clamp, wherein the lower limb isillustrated as defining a longer length than the upper limb;

FIG. 3B is a side elevation of the distal end of the blade afterinstallation of the distal end clamp, wherein the blade is deformed intoa curved configuration such that the distal ends of each of the upperand lower limbs are aligned;

FIG. 3C is a side elevation of the distal end of the blade illustratingthe relative positions of the distal ends of the upper and lower limbsas the practice sword is thrust;

FIG. 3D is a side elevation of the distal end of the blade illustratingthe further relative positions of the distal ends of the upper and lowerlimbs as the practice sword is thrust further;

FIG. 4 illustrates the deformation of the blade during an impact,wherein the blade is deformed to define an S-shaped configuration;

FIG. 5 is a side elevation view, in section taken along 5-5 of FIG. 1,of the handle of the practice sword of the present invention;

FIG. 6 is a perspective view of an alternate embodiment of a practicesword constructed in accordance with several features of the presentinvention;

FIG. 7 is a perspective view of a further alternate embodiment of apractice sword constructed in accordance with several features of thepresent invention;

FIG. 8 is an end view, in section taken along 8-8 of FIG. 7, of thepractice sword;

FIG. 9 is an exploded view, in perspective, of the practice sword ofFIG. 7;

FIG. 10A is a side elevation of the distal end of the blade afterinstallation of the end spacer, wherein the blade is deformed into acurved configuration such that the distal ends of each of the upper andlower limbs are aligned; and

FIG. 10B is a side elevation of the distal end of the blade illustratingthe relative positions of the distal ends of the upper and lower limbsas the practice sword is thrust.

DETAILED DESCRIPTION OF THE INVENTION

A practice sword simulating a Katana is disclosed. The practice sword ofthe present invention is illustrated at 10 in the figures. The practicesword, or practice sword 10, of the present invention provides anaffordable, safe practice weapon that correctly simulates the size,weight and curve of the Japanese sword with both simulated cutting andthrusting capabilities.

FIG. 1 illustrates one embodiment of the practice sword 10 of thepresent invention. The practice sword includes generally a handle 12, ahandle guard 24, and a simulated blade 28. The blade 28 is comprised ofa plurality of flexible limbs 34. The limbs 34 are interconnected at aproximal end 36, proximate the handle 12 and handle guard 24. Asdiscussed in greater detail below, the distal end 38 of each limb 34 islimited to axial movement with respect to each other limb 34. The blade28 defines a taper from its proximal end 30 to its distal end 32. Thetaper is defined both in the lateral direction and in the verticaldirection.

In the first illustrated embodiment, the blade 28 is comprised of twoflexible limbs 34. More particularly, the blade includes an upper limb34U and a lower limb 34L. As best illustrated in FIG. 2, which is anexploded view, in perspective, of the practice sword 10 of FIG. 1, theupper limb 34U of the illustrated embodiment defines an invertedsubstantially U-shaped configuration having a substantially flat topsurface 42. The top surface 42 being substantially flat providesstability of the blade 28 in the lateral directions. Specifically, thislimits bending of the blade 28 in either the left or right directionswhen the sword 10 is properly held.

The lower limb 34L also defines a substantially U-shaped configuration.However, the lower limb 34L defines an arcuate bottom surface 52. Thisconfiguration is beneficial in several ways. To with, the arcuateconfiguration provides stability of the blade 28 in the verticaldirections. Further, the arcuate configuration, which corresponds to thecutting edge of a blade, creates a less harmful, and therefore a lesspainful, impact zone. As discussed below, the lower limb 34L is longerthan the upper limb 34U such that the upper and lower limbs 34U, 34L aredeformed into an arcuate configuration to bring the respective distalends 38U, 38L into alignment.

At least one clamp is provided for maintaining the relative positions ofthe upper and lower limbs 34U, 34L. In the illustrated embodiment, aproximal end clamp 58 is secured to the respective distal end 38U, 38Lof each of the upper and lower limbs 34U, 34L proximate the handle guard24. The proximal end clamp 58 serves to secure the proximal end 36U, 36Lof each of the upper and lower limbs 34U, 34L together. Also illustratedis a medial clamp 60 positioned along the length of the blade 28, and adistal end clamp 68 disposed at the distal end 32 of the blade 28. Itwill be understood that the number and positioning of the medial clamps60 may be varied within the scope of the present invention. For example,it may be desirable in some embodiments to include more medial clamps 60in order to further increase the lateral stability of the blade 28, orto decrease the ability of the blade 28 to twist on impact.

Each of the medial clamps 60 and the distal end clamp 68 defines asaddle portion 62, 70, respectively, configured to slidably receive thelower limb 34L. Each medial clamp 60 defines a substantially U-shapedconfiguration, with the upper end 64 of each side extending away fromthe saddle portion 62 to engage the side portions of the upper limb 34U.Each medial clamp 60 is secured to the upper limb 34U in a conventionalmanner such that the lower limb 34L is substantially limited tolongitudinal movement through the medial clamp 60. In the illustratedembodiment, conventional fasteners 66, such as rivets are used toaccomplish such securement. However, it will be understood that otherconventional fasteners 66 and means for fastening may be used.

The distal end clamp 68 is configured and secured to the sword 10 insimilar fashion to the medial clamp 60, with the additional feature ofan extended portion 72 configured to extend longitudinally from thesaddle portion 70. The extended portion 72 is dimensioned to be deformedover the distal end 38U, 38L of each of the upper and lower limbs 34U,34L, and secured to the top surface 42 of the upper limb 34U. While thedistal end clamp 68 is configured to allow longitudinal movement of thelower limb 34L therein, the extended portion 72 limits such movementwhich would allow the lower limb 34L to extend beyond the distal endclamp 68. This extended portion 72 also provides a continuous strikingsurface, thereby eliminating the risk of injury due to the movementbetween the distal ends 38U, 38L of the upper and lower limbs 34U, 34L.

Further, as described in further detail below, the distal end clamp 68serves to maintain the distal ends 38U, 38L of the upper and lower limbs34U, 34L in alignment. As briefly disclosed above, the lower limb 34L islonger than the upper limb 34U such that when they are each deformedinto an arcuate configuration, the respective distal ends 38U, 38L arealigned. When the upper and lower limbs 34U, 34L are so deformed, thedistal end clamp 68 is then installed in order to maintain thecurvature. Specifically, the distal end clamp extended portion 72 servesto limit the relative longitudinal movement of the lower limb 34L,preventing it from extending out of the distal end clamp 68, and therebypreventing the blade 28 from returning to its original, undeformedstate.

FIGS. 3A-3D better illustrates the relative movement permitted betweenthe upper and lower limbs 34U, 34L. While the movement is not easilydetected within the medial clamps 60, it is more noticeable within thedistal end clamp 68. Accordingly, the distal end 38U, 38L of each of theupper and lower limbs 34U, 34L is shown in phantom to illustrate theirapproximate positions within the distal end clamp 68. Because the distalend clamp 68 is secured only to the distal end 38U of the upper limb34U, the position of the upper limb distal end 38U within the distal endclamp 68 is the same in each figure.

FIG. 3A illustrates the sword 10 of the present invention prior to thesecurement of the distal end clamp 68. In this figure, it is moreclearly illustrated that the lower limb 34L is longer than the upperlimb 34U. As described above, when the upper and lower limbs 34U, 34Lare collectively deformed into an arcuate configuration, the distal ends38U, 38L of the upper and lower limbs 34U, 34L are brought intoalignment. At this point, as illustrated in FIG. 3B, the distal endclamp 68 is secured, and the arcuate configuration is maintained.

FIGS. 3C and 3D illustrate the relative positions of the distal end 38U,38L of each of the upper and lower limbs 34U, 34L as the sword 10 isthrust. As the result of this motion, the distal end 32 of the swordblade 28 is bent backward, causing the distal end 38L of the lower limb34L to travel in a longitudinal direction backward within the distal endclamp 68. Because the medial and distal end clamps 60, 68 are securedonly to the upper limb 34U, the upper and lower limbs 34U, 34L arepermitted to bend without the sides of the sword 10 buckling orbreaking.

FIG. 4 illustrates the deformation of the blade 10 during an impact. Thefloating lower limb 34L and the distance between the medial and distalend clamps 60, 68 allows for substantial impact absorption. The upperand the lower limbs 34U, 34L are in contact when resting in thepreloaded state (FIG. 3B). Impact causes the upper and lower limbs34U,34L to separate from each other, thus relieving some force. In testswith both limbs 34U, 34L connected as one continuous tapering tube, theresult was a substantial impact. However, in the illustrated embodimentwherein the upper and lower limbs 34U, 34L are fixed at their respectiveproximal ends 36U, 36L, the impact is reduced. This is a result of theupper and lower limbs 34U, 34L being allowed to rebound during duress orimpact.

As illustrated in FIG. 5, the handle 12 of the illustrated embodimentincludes a respective extended portion 44, 54 of the proximal end 36U,36L of each of the upper and lower limbs 34U, 34L. The handle guard 24,or tsuba, defines an opening 26 through which the blade 28 is receivedprior to the securement of the proximal end, medial and distal endclamps 58, 60, 68. (See FIG. 2.) A handle insert 14 is received betweenthe extended portions 44, 54 of the respective proximal ends 36U, 36L ofthe upper and lower limbs 34U, 34L and secured thereto. Securement ofthe handle insert 14 is accomplished via conventional means such as theillustrated fasteners 66. The handle insert 14 serves to give integrityto the handle 12. The securement of the handle insert 14 to the upperand lower limbs 34U, 34L also prevents movement “walking” of the upperand lower limbs 34U, 34L.

The extended portion 44 of the upper limb 34U defines an arcuate topsurface 46. A transition 48 is thus defined between the arcuate surface46 and the flat surface 42 on the blade portion of the upper limb 34U.The transition 48 serves as a limit for the handle guard 24.

FIG. 6 illustrates an alternate embodiment of the practice sword 10′. Inthis embodiment, the blade 28′ defines a shorter length as compared tothe previously described sword 10.

A further alternate embodiment of the practice sword is illustrated at10″ in FIGS. 7-10. In this embodiment, the practice sword 10″ moreclosely resembles the Katana discussed above. However, in the practicesword 10″ of the present invention, features as described above in theprevious embodiments are incorporated therein in order to achieve a morerealistic practice fight with less risk of injury. The practice sword10″ of the present invention is useful in full contact, full forcematches.

The practice sword 10″ includes generally a handle 12″, a handle guard24″, and a simulated blade 28″. The blade 28″ is comprised of aplurality of flexible limbs 34″. The limbs 34″ are interconnected at aproximal end 36″, proximate the handle 12″ and handle guard 24″. Asdiscussed in greater detail below, the distal end 38″ of each limb 34″is limited to axial movement with respect to each other limb 34″. In thepreferred embodiment, each flexible limb 34″ is fabricated from bamboo.However, it will be understood that other materials may be used withinthe spirit of the present invention.

Illustrated are three flexible limbs 34″. Each flexible limb 34″ isformed into a slight longitudinal curve. The curvature of the limbs 34″allows the simulated blade 28″ to bend backward as a blow is struck,thus dissipating the force of the blow. Conversely, the longitudinalcurvature limits forward bending of the blade 28″. The force of a thrustwith the sword 10″ is also dissipated by the same bending action.

As best illustrated in FIG. 8, the cross section of each limb 34″defines a curvature as a result of the natural curvature of a bamboostalk. Where a material other than bamboo is used, other cross-sectionalconfigurations may be incorporated as well. However, in the illustratedembodiment, the lateral curvature of each limb 34″ limits lateralbending of the sword 10″ in either direction. Thus, the sword 10″ issubstantially limited to bending only in one direction.

In the illustrated embodiment, three flexible limbs 34″ areincorporated. However, it will be understood that more or fewer may beused in various applications. To this extent, it will also be understoodthat each flexible limb 34″ is not required to extend to the distal end32″ of the blade 28″.

FIG. 9 illustrates an exploded view of the practice sword 10″. Thisillustration more clearly shows the construction of the handle 12″ andblade 28″ of this embodiment. The handle 12″ defines at least oneextended portion 16. The handle guard 24″ defines an opening 26 throughwhich the extended portion 16 is received. Upper and lower shoulders 18are defined by the handle 12″ for engaging the handle guard 24″ to limitmovement of the handle guard 24″ toward the handle 12″. In theillustrated embodiment, two extended portions 16 are defined by thehandle 12″ and received through the handle guard opening 26″. Theextended portions 16 are spaced apart to closely receive the proximalend 36M of the medial flexible limb 34M. The uppermost flexible limb34U″ is disposed above the upper extended portion 16. Likewise, thelowermost flexible limb 34L″ is disposed below the lower extendedportion 16. The proximal end 36U″, 36L″ of each of the uppermost andlowermost limbs 34U″, 34L″ is disposed at the handle guard 24″, therebylimiting movement of the handle guard away from the handle. As a result,the handle guard 24″ is substantially prevented from movement after thesword 10″ is assembled. The handle 12″ of the preferred embodiment isprovided with a conventional grip.

The proximal end 36″ of each flexible limb 34″ is secured to the handle12″ in a conventional manner. In the illustrated embodiment, two dowels20 are closely received and glued into place within cooperating openings17, 37 defined in the handle extended portions 16 and in the proximalend 36″ of each of the limbs 34″. In the preferred embodiment, thespaces defined between the handle extended portions 16 and the proximalends 36″ of the limbs 34″ (see FIG. 8) are filled with an epoxy tostrengthen the integrity of the sword 10″.

As illustrated in FIG. 10A, an end spacer 76 is disposed at the distalend 32″ of the blade 28″. The spacer 76 in the illustrated embodimentdefines a distal end wall 78 that provides a striking surface whenthrusting the sword 10″. At least one spacing element 80 extends fromthe distal end wall 78. Each spacing element 80 is configured to bereceived between the distal ends 38″ of an adjacent pair of flexiblelimbs 34″. In the illustrated embodiment, two spacing elements 80 areprovided. The distal end 32″ of the blade 28″ is wrapped with a distalend cover 82 in order to maintain the position of the end spacer 76 withrespect to the uppermost flexible limb 34U″. To this extent, the distalend cover 82 is secured to the distal end 38″ of the uppermost flexiblelimb 34U″.

The distal end 38M, 38L″ of each of the medial and lowermost flexiblelimbs 34M, 34L″ is allowed to float within the end spacer 76. This isillustrated in FIG. 10B, which illustrates the blade 28″ being flexedbackward when either a blow or thrust is struck.

Due to the spacing at the proximal ends 36″ of the limbs 34″ and thedistal ends 38″ of the limbs 34″, the sword 10″ simulates the sound of aKatana when either a blow or thrust is struck.

In order to simulate the weight of a real sword, weights (notillustrated) may be added to the sword 10″ of the present invention, oneither side of the proximal end 30″ of the blade 28″. This does notincrease the force of the blow to any real degree, as the weight ismerely forward of the hand, and there is no increase in mass in thestriking area.

From the foregoing description, it will be recognized by those skilledin the art that several embodiments of a practice sword simulating aKatana have been provided. The practice sword of the present inventionprovides an affordable, safe practice weapon that correctly simulatesthe size, weight and curve of the Japanese sword with both simulatedcutting and thrusting capabilities.

While the present invention has been illustrated by description ofseveral embodiments and while the illustrative embodiments have beendescribed in considerable detail, it is not the intention of theapplicant to restrict or in any way limit the scope of the appendedclaims to such detail. Additional advantages and modifications willreadily appear to those skilled in the art. The invention in its broaderaspects is therefore not limited to the specific details, representativeapparatus and methods, and illustrative examples shown and described.Accordingly, departures may be made from such details without departingfrom the spirit or scope of applicant's general inventive concept.

1. A practice sword for simulating a Katana, said practice swordcomprising: a handle; a handle guard; and a blade defining a proximalend and a distal end, said blade including a plurality of flexiblelimbs, wherein each of said plurality of flexible limbs defines aproximal end and a distal end, said proximal end of each flexible limbbeing secured to said practice sword proximate said handle guard, andsaid distal end of each of said plurality of flexible limbs beinglimited to axial movement with respect to each other of said pluralityof flexible limbs.
 2. The practice sword of claim 1 wherein said bladedefines a taper from said proximal end of said blade to said distal endof said blade, said taper being defined in at least one of a lateraldirection and a vertical direction.
 3. The practice sword of claim 1wherein said plurality of flexible blades includes: an upper limb, saidupper limb defining an inverted substantially U-shaped configurationhaving a substantially flat top surface; and a lower limb, said lowerlimb defining a substantially U-shaped configuration having an arcuatebottom surface.
 4. The practice sword of claim 1 further comprising atleast one retainer for maintaining a relative position between saidplurality of flexible limbs.
 5. The practice sword of claim 4 whereinsaid upper limb defines a first length, and wherein said lower limbdefines a second length, said second length being longer than said firstlength, said upper limb and said lower limb being deformed to define anarcuate configuration such that said upper limb distal end and saidlower limb distal end are brought into alignment, said at least oneretainer including a distal end retainer carried at said distal end ofsaid blade for maintaining said arcuate configuration of said blade. 6.The practice sword of claim 4 wherein said at least one retainerincludes a proximal end retainer secured to said proximal end of saidupper limb and said proximal end of said lower limb.
 7. The practicesword of claim 4 wherein said at least one retainer includes at leastone medial retainer secured to one of said upper limb and said lowerbetween said blade proximal end and said blade distal end.
 8. Thepractice sword of claim 7 wherein each of said at least one medialretainer defines a saddle portion configured to slidably receive saidlower limb, said saddle portion defining opposing sides configured toengage and be secured to said upper limb.
 9. The practice sword of claim3 wherein said proximal end of said upper limb defines an extendedportion, wherein said proximal end of said lower limb defines anextended portion, and wherein said handle guard defines a centralopening, said upper limb proximal end extended portion and said lowerlimb proximal end extended portion cooperating to define said handle,said handle being received through said handle guard central opening.10. The practice sword of claim 9 further comprising a handle insertconfigured to be received within said handle and secured to each of saidupper limb and said lower limb, said handle insert being provided toprevent relative movement between said upper limb proximal end extendedportion and said lower limb proximal end extended portion.
 11. Thepractice sword of claim 1 wherein said plurality of flexible bladesincludes: an uppermost limb defining a proximal end and a distal end; amedial limb defining a proximal end and a distal end, said medial limbproximal end being fixed relative to and spaced apart from saiduppermost limb proximal end; and a lowermost limb defining a proximalend and a distal end, said lowermost limb proximal end being fixedrelative to and spaced apart from said medial limb proximal end.
 12. Thepractice sword of claim 11 wherein said handle guard defines a centralopening, and wherein said handle defines a proximal end and a distalend, said handle distal end defining first and second extended portions,said handle guard opening being configured to receive said handle firstand second extended portions, said handle first and second extendedportions being spaced apart to closely receive said medial limb proximalend, said uppermost limb proximal end being disposed above said handlefirst extended portion, said lowermost limb proximal end being receivedbelow said handle second extended portion, each of said uppermost limbproximal end, said medial limb proximal end and said lowermost limbproximal end being secured to said handle first and second extendedportions.
 13. The practice sword of claim 11 wherein each of saiduppermost limb, said medial limb, and said lowermost limb is configuredto define an upward curvature to allow said blade to bend backward aseither a blow or thrust is struck, whereby the force of the strike isdissipated.
 14. The practice sword of claim 11 wherein each of saiduppermost limb, said medial limb, and said lowermost limb is fabricatedfrom bamboo.
 15. The practice sword of claim 11 further comprising anend spacer disposed at said distal end of said blade and secured to saiduppermost limb distal end, and a distal end cover received over saiddistal end of said blade, said end spacer defining a distal end wall andfirst and second spacing elements extending from said distal end wall,said first spacing element being received between said uppermost limbdistal end and said medial limb distal end, and said second spacingelement being received between said medial limb distal end and saidlowermost limb distal end, whereby as a blow or a thrust is struck, saidmedial limb distal end and said lowermost limb distal end are limited toaxial movement with respect to each other and said uppermost limb distalend.
 16. A practice sword for simulating a Katana, said practice swordcomprising: a handle; a handle guard; a blade defining a proximal endand a distal end, said blade defining a taper from said proximal end ofsaid blade to said distal end of said blade, said taper being defined inat least one of a lateral direction and a vertical direction, said bladeincluding: an upper limb defining a first length and having a proximalend and a distal end, said upper limb defining an inverted substantiallyU-shaped configuration having a substantially flat top surface, saidproximal end of said upper limb being secured to said practice swordproximate said handle guard; and a lower limb defining a second lengthand having a proximal end and a distal end, said lower limb defining asubstantially U-shaped configuration having an arcuate bottom surface,said proximal end of said lower limb being secured to said practicesword proximate said handle guard, said distal end of said lower limbbeing limited to axial movement with respect to said distal end of saidupper limb, said second length being longer than said first length, saidupper limb and said lower limb being deformed to define an arcuateconfiguration such that said upper limb distal end and said lower limbdistal end are brought into alignment; a proximal end retainer securedto said proximal end of said upper limb and said proximal end of saidlower limb; at least one medial retainer secured to one of said upperlimb and said lower between said blade proximal end and said bladedistal end, each of said at least one medial retainer defining a saddleportion configured to slidably receive said lower limb, said saddleportion defining opposing sides configured to engage and be secured tosaid upper limb; and a distal end retainer carried at said distal end ofsaid blade for maintaining said arcuate configuration of said blade. 17.The practice sword of claim 16 wherein said proximal end of said upperlimb defines an extended portion, wherein said proximal end of saidlower limb defines an extended portion, and wherein said handle guarddefines a central opening, said upper limb proximal end extended portionand said lower limb proximal end extended portion cooperating to definesaid handle, said handle being received through said handle guardcentral opening.
 18. A practice sword for simulating a Katana, saidpractice sword comprising: a handle defining a proximal end and a distalend, said handle distal end defining first and second extended portions;a handle guard defining a central opening configured to receive saidhandle first and second extended portions; a blade defining a proximalend and a distal end, said blade including: an uppermost limb defining aproximal end and a distal end, said proximal end of said uppermost limbbeing secured to said practice sword proximate said handle guard, saiduppermost limb proximal end being disposed above and secured to saidhandle first extended portion, said uppermost limb being configured todefine an upward curvature to allow said blade to bend backward aseither a blow or thrust is struck, whereby the force of the strike isdissipated, said uppermost limb being fabricated from bamboo; a mediallimb defining a proximal end and a distal end, said medial limb proximalend being fixed relative to and spaced apart from said uppermost limbproximal end, said proximal end of said limb being secured to saidpractice sword proximate said handle guard, said distal end of saidmedial limb being limited to axial movement with respect to saiduppermost limb, said handle first and second extended portions beingspaced apart to closely receive said medial limb proximal end, saidmedial limb proximal end being secured between said handle first andsecond extended portions, said medial limb being configured to define anupward curvature to allow said blade to bend backward as either a blowor thrust is struck, whereby the force of the strike is dissipated, saidmedial limb being fabricated from bamboo; and a lowermost limb defininga proximal end and a distal end, said lowermost limb proximal end beingfixed relative to and spaced apart from said medial limb proximal end,said proximal end of said limb being secured to said practice swordproximate said handle guard, said distal end of said lowermost limbbeing limited to axial movement with respect to said medial limb, saidlowermost limb proximal end being received below said handle secondextended portion, said lowermost limb being configured to define anupward curvature to allow said blade to bend backward as either a blowor thrust is struck, whereby the force of the strike is dissipated, saidlowermost limb being fabricated from bamboo; an end spacer disposed atsaid distal end of said blade and secured to said uppermost limb distalend, said end spacer defining a distal end wall and first and secondspacing elements extending from said distal end wall, said first spacingelement being received between said uppermost limb distal end and saidmedial limb distal end, and said second spacing element being receivedbetween said medial limb distal end and said lowermost limb distal end;and a distal end cover received over said distal end of said blade,whereby as a blow or a thrust is struck, said medial limb distal end andsaid lowermost limb distal end are limited to axial movement withrespect to each other and said uppermost limb distal end.